Question

if a piece of equipment is not working properly, stop, turn it off, and tell *
the custodian.
your lab parner.
your best friend in the class.
the science instructor.
if an acid is splashed on your skin, wash at once with *
soap
oil
weak base
plenty of water

Explanation:

When equipment malfunctions in a science - related context (such as a lab), the science instructor is the appropriate authority to inform as they have the knowledge and responsibility to handle such situations. For acid on the skin, water is the immediate and correct substance to wash with as it can dilute the acid and reduce its corrosive effect. Soap may react inappropriately, oil will not neutralize or dilute the acid effectively, and weak base application (if not done properly) can cause further harm. Immediate flushing with plenty of water is the standard first - aid procedure.

Answer:

For the first question: the science instructor.
For the second question: plenty of water.